I think it totally rocks that you guys are going to publish girlfriends!
Yuri/shoujo ai really deserves more love.
I would like to see this manga published in english: ''gunjou''http://www.mangaupdates.com/series.html?id=30908
I have read the first volume and it's just so good, and really refreshing if you compare it with the avarage yuri story. Which are a lot of fluff, kawaiines and schoolgirls stuff. Nothing wrong with those, I really like those kind of yuri too. However this manga has really something unique, it has really it's 'own' art, it's own flair and the story just grabs you from the beginning till the end.
And ofcourse the manga ''Prism'' --> http://www.mangaupdates.com/series.html?id=68108
Which is really hot stuff right now, and I can understand why!
It has some great art, the story is funny and it is more realistic then most yuri manga out there.
I hope sevenseas will have a look at those two titles, otherwise I can almost ensure you, that you will regret it.
now let's do some serious manga reading here!